The 10.5.7 update is out. The update comes most notably with a number of security fixes. Also, you’ll find some fixes for network performance (in certain environments), home directories, improved Finder searching for network volumes, directory services updates, mcx updates, synchronization issues (iCal, Notes from Mail, MobileMe) and some printing improvements (most notably with the annoying allowing non-admin users to add printers issue).
Overall it’s a good update and if you need to run things through a lab in your environment then you’re big enough to likely see some benefits from this update and should start doing so sooner rather than later. Not that it’s only for larger environments, but many of the updates seem to address some very specific pain points there…
